Rack



FIG. 1 is a right-side elevational view of a rack showing my new design; the left-side elevational view being a mirror image thereof;

FIG. 2 is a front elevational view thereof; the rear elevational view being a mirror image thereof;

FIG. 3 is a top plan view thereof; and,

FIG. 4 is an enlarged fragmentary sectional view taken along line 4--4- in FIG. 1.

The broken line showing of computer components in FIG. 2 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a rack, as shown and described. 